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CATEGORY 6 - SENSORS AND LASERS

6C Materials

CATEGORY 6 - SENSORS AND LASERS

6C Materials

6C002 Optical sensor materials as follows:

a. Elemental tellurium (Te) of purity levels of 99,9995 % or more;

b. Single crystals (including epitaxial wafers) of any of the following:

1. Cadmium zinc telluride (CdZnTe), with zinc content of less than 6 % by 'mole fraction';

2. Cadmium telluride (CdTe) of any purity level; or

3. Mercury cadmium telluride (HgCdTe) of any purity level.

6C004 Optical materials as follows:

a. Zinc selenide (ZnSe) and zinc sulphide (ZnS) "substrate blanks", produced by the chemical vapour deposition process and having any of the following:

1. A volume greater than 100 cm³; or

2. A diameter greater than 80 mm and a thickness of 20 mm or more;

b. Electro-optic materials and non-linear optical materials, as follows:

1. Potassium titanyl arsenate (KTA) (CAS 59400-80-5);

2. Silver gallium selenide (AgGaSe2 , also known as AGSE) (CAS 12002-67-4);

3. Thallium arsenic selenide (Tl3AsSe3 , also known as TAS) (CAS 16142-89-5);

4. Zinc germanium phosphide (ZnGeP2, also known as ZGP, zinc germanium biphosphide or zinc germanium diphosphide); or

5. Gallium selenide (GaSe) (CAS 12024-11-2);

c. Non-linear optical materials, other than those specified in 6C004.b., having any of the following:

1. Third order susceptibility (chi 3) of 10E-6 m²/V² or more; and

2. A response time of less than 1 ms;

1. Having all of the following: a. Dynamic (also known as non-stationary) third order non-linear susceptibility (χ(3), chi 3) of 10-6 m2/V2 or more; and b. Response time of less than 1 ms; or

2. Second order non-linear susceptibility (χ(²), chi 2) of 3,3×10E-11 m/V or more;

d. "Substrate blanks" of silicon carbide or beryllium beryllium (Be/Be) deposited materials, exceeding 300 mm in diameter or major axis length;

e. Glass, including fused silica, phosphate glass, fluorophosphate glass, zirconium fluoride (ZrF 4 ) (CAS 7783-64-4) and hafnium fluoride (HfF 4 ) (CAS 13709-52-9) and having all of the following:

1. A hydroxyl ion (OH-) concentration of less than 5 ppm;

2. Integrated metallic purity levels of less than 1 ppm; and

3. High homogeneity (index of refraction variance) less than 5 × 10E-6;

f. Synthetically produced diamond material with an absorption of less than 10E-5 cm-¹ for wavelengths exceeding 200 nm but not exceeding 14 000 nm.

6C005 "Laser" materials as follows:

a. Synthetic crystalline "laser" host material in unfinished form as follows:

1. Titanium doped sapphire;

2. Not used.

b. Rare-earth-metal doped double-clad fibres having any of the following:

1. Nominal "laser" wavelength of 975 nm to 1 150 nm and having all of the following:

a. Average core diameter equal to or greater than 25 µm; and

b. Core 'Numerical Aperture' ('NA') less than 0,065; or

2. Nominal "laser" wavelength exceeding 1 530 nm and having all of the following:

a. Average core diameter equal to or greater than 20 µm; and

b. Core 'NA' less than 0,1.

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